body, div,
ul {
  margin: 0;
  padding: 0;
}

ul {
  list-style: none;
}

.pages_con {
  position: fixed;
  left: 0;
  top: 0;
  width: 100%;
  overflow: hidden;
}

.pages {
  height: 600px;
  position: relative;
}

.page1 {
  background-color: orange;
}

.page2 {
  background-color: lightgreen;
}

.page3 {
  background-color: cyan;
}

.page4 {
  background-color: pink;
}

.page5 {
  background-color: lightblue;
}


.points {
  width: 16px;
  height: 176px;
  position: fixed;
  right: 20px;
  top: 50%;
  margin-top: -88px;
}

.points li {
  width: 13px;
  height: 13px;
  margin: 16px 0;
  border-radius: 50%;
  border: 1px solid #666;
  cursor: pointer;
}

.points li.active {
  background-color: #666;
}

.main_con {
  width: 900px;
  height: 400px;
  position: absolute;
  left: 50%;
  top: 50%;
  margin-left: -450px;
  margin-top: -200px;
}

.main_con .left_img {
  width: 363px;
  height: 400px;
  float: left;
  position: relative;
  left: -50px;
  opacity: 0;
  filter: alpha(opacity=0);
  transition: all 1000ms ease 300ms;
}

.main_con .right_info {
  width: 500px;
  height: 300px;
  margin-top: 50px;
  float: right;
  font-family: 'Microsoft Yahei';
  font-size: 20px;
  line-height: 50px;
  color: #666;
  text-indent: 2em;
  text-align: justify;
  position: relative;
  right: -50px;
  opacity: 0;
  filter: alpha(opacity=0);
  transition: all 1000ms ease 300ms;
}


.moving .main_con .left_img {
  left: 0;
  opacity: 1;
  filter: alpha(opacity=100);
}

.moving .main_con .right_info {
  right: 0;
  opacity: 1;
  filter: alpha(opacity=100);
}

.main_con .right_img {
  width: 522px;
  height: 400px;
  float: right;
  position: relative;
  top: -50px;
  opacity: 0;
  filter: alpha(opacity=0);
  transition: all 1000ms ease 300ms;
}

.main_con .left_info {
  width: 350px;
  height: 300px;
  margin-top: 50px;
  float: left;
  font-family: 'Microsoft Yahei';
  font-size: 20px;
  line-height: 50px;
  color: #666;
  text-indent: 2em;
  text-align: justify;
  position: relative;
  bottom: -50px;
  opacity: 0;
  filter: alpha(opacity=0);
  transition: all 1000ms ease 300ms;
}

.moving .main_con .right_img {
  top: 0;
  opacity: 1;
  filter: alpha(opacity=100);
}

.moving .main_con .left_info {
  bottom: 0;
  opacity: 1;
  filter: alpha(opacity=100);
}


.main_con .center_img {
  width: 611px;
  height: 337px;
  position: absolute;
  left: 50%;
  margin-left: -305px;
  bottom: -50px;
  opacity: 0;
  filter: alpha(opacity=0);
  transition: all 1000ms ease 300ms;

}

.moving .main_con .center_img {
  bottom: 0;
  opacity: 1;
  filter: alpha(opacity=100);
}